Week 1 Checkpoint- OSI model

Week 1 Checkpoint- OSI model - The Data Link Layer provides...

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Running head: OSI MODEL 1 OSI Model Stephen D, James IT-242 John Tinney June 24, 2011 University of Phoenix (Axia College)
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OSI MODEL 2 OSI Model With the goal of standardizing the world of networks, the International Organization for Standardization (ISO) began development of the open systems interconnection (OSI) reference model (Regan, 2004). After analyzing the seven layers of the OSI model it is seen that layer three is where WAN protocols operate on; layer three is also known as the network layer. The network layer performs routing functions and identifies end-to-end addressing and routing datagram’s. The Network Layer performs network routing functions and might also perform fragmentation and reassembly, it also reports delivery errors. There is a unit called a brouter that some layers contain which functions as a router and a bridge. Routers and switches operate on layers 2-4 (data link layer, network layer and transport layer).
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Unformatted text preview: The Data Link Layer provides the function to transfer data between networks and to detect and maybe correct errors that may occur in the Physical Layer. Originally this layer was intended for point-to-point and point-to-multipoint media characteristics of wide area media in the telephone system. On layer three of the OSI model, the network layer is where the addressing and routing is performed; the best-known example of a network layer protocol is the Internet Protocol (IP). On the transport layer of the OSI model is where the flow control and error handling performs; the best-known example of the transport layer is the Transmission Control Protocol (TCP). Finally, on the session layer (layer five), the synchronizations and assemblies are all done. OSI MODEL 3 References Regan, P. (2004). Wide area networks. New Jersey: Pearson Education, Inc. Chapter 2...
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